Cars - starting and stopping
Up until recently, lead was added to the petrol used to power car engines. Galena is the main ore of lead, but because we now know lead is quite poisonous, we do not use it much any more.

Car brakes can be made from asbestos minerals. But we now know that asbestos is bad for us well. Researchers are working on a replacement for asbestos in brake pads and other fixtures.

Aeroplanes
Two metals, aluminium and titanium, are used a lot in aeroplanes because they are lightweight and strong. Aluminium comes from a material called bauxite. Titanium comes from minerals called rutile and ilmenite.

Titanium is also important in space flight, as it is used a lot in the manufacture of space shuttles.